US2208482A

US2208482A - Grease retainer with integral diaphragm and outer seal

Info

Publication number: US2208482A
Application number: US96772A
Authority: US
Inventors: Joseph B Victor
Original assignee: Victor Manufacturing and Gasket Co
Current assignee: Victor Manufacturing and Gasket Co
Priority date: 1936-08-19
Filing date: 1936-08-19
Publication date: 1940-07-16
Anticipated expiration: 1957-07-16

Description

J. B. VICTOR Filed Aug. 19. 1936 3 Sheets-Sheet 1 FIG. 6

JOSEPH 5. VIC TOR PER A TTOR/VE Y July 16, 1940.

GREASE RETAINER WITH INTEGRAL DIAPHRAGM AND OUTER SEAL July 16, 1940. J. B. VICTOR 2,208,482

GREASE RETAINER WITH INTEGRAL DIAPHRAGM AND OUTER SEAL Filed Aug. 19, 1956 3 Sheets-Sheet 2 JOJEPH B. V/CTOR [NI/ENTOR PEI? AZJZ/ mews) J. B. VICTOR July 16, 1940.

GREASE RETAINER WITH INTEGRAL DIAPHRAGM AND OUTER SEAL FiledAug. 19. 1936 3 Sheets-Sheet 5 Pm A A T TORNEY Patented July 116, 1940 UNITED STATES PATENT OFFICE GREASE RETAINER WITH INTEGRAL DIAPHRAGM AND OUTER, SEAL Joseph B. Victor, Oak Park, Ill., assignor to Victor Manufacturing & Gasket Company, Chicago, 11]., a corporation of Illinois Application August 19, 1936, Serial No. 96,772

7 Claims. (01. 288-3) This invention relates to an improved grease the revolving shaft, and the diaphragm or sealing retainer or fluid seal, and has for one of its prinportion contacts the inner face of the housing. cipal objects, the provision of such a seaL par- Figure 10 is a view somewhat similar to Figure 9 ticularly adapted for use with automobiles or the but showing a diiferent type of steel shell. like wherein the diaphragm or sealing element Figure 11 is a view similar to Figure 10 only which surrounds the shaft is extended to produce illustrating a further modification of the invenan outer seal with the housing in which the shaft tion. i positioned Figure 12 illustrates another simplified form. One of the important objects of this invention Figure 13 is a view similar to Figure 12 but is to provide a combination sealing element comshowing a reinforced y of Shell and a Slightly 10 posed of a metal shell and a flexible diaphragm difierent structure of diaphragm.

wherein the ordinary metal-to-metal contact begure 14 is a view somewhat similar to Fi e tween the metal shell of the seal and the interior 12 b t Sh the Outer p u d up a d face of the housing is eliminated. d y- 15 Another object, of the invention is to produce a Figure 15 illustrates a structure somewhat 15 supplemental sealing means between the outer similar to that of Figure 14 but with some of the rim of the grease retainer shell and a surroundmetal structure cut away.

ing housing so that a complete metal-to-metal Figure 16 shows a still further embodiment of contact will be eliminated and a more flexible the invention somewhat similar to that illustrated and cushion-like sealing structure result which in Figure 15 t made in tWO P e 20 shall tend to reduce loss of oil by leaks between Figure 17 is a still further embodiment of the the shell and the housing due to eccentricity, iminven ion w rein he us l ar r pr n is proper fitting or the like. eliminated.

A still further object of the invention is the As shown in the drawings: provision in an oil seal or the like of means for he efe e ce nu er l 20 nd cates ge erally 25 automatically compensating for any eccentricithe improve meta shell of the e grease r ties or other imperfections between the grease tainer or oil seal of this invention, the same beretainer shell and the housing into which it is ing in the form of an annular cup L-shaped in driven. cross-section as shown in Figure 1. V

Other and further important objects of the in- The diaphr r se n means is mposed 30 vention will be apparent from the disclosures in of an inner layer 22 of plastic or the like and the accompanying drawings and following specL- outer layers 24 of some fabric or similar material, fication. the same being vulcanizedto the metal of the The invention, in a preferred form, is illusshell 20 during the process of manufacture, as the trated in the drawings and hereinafter more fully material th r f i ne lly a ynth ti r r 35 described. which can be molded at will. The molding oper- In the drawings: ation expresses a part of the diaphragm while in Figure 1 is a sectional view of an improved type the plas State through a Opening 25 in t e of oil seal embodying the principles of this invenshell, and the synthetic rubber or the like will tion. actually contact and closely adhere to the metal 40 Figure 2 shows a slight modification. of the shell 20, thereby forming a very good oil- Figure 3 illustrates a further modification. t t j A s e 8 is po o ed in the Figure 4 is a further adaptation of the trucouter face of the shell 20 by chamfering or the ture shown in Figure 3, like as shown at 30, and a coil spring 40 is em- 5 Figure 5 shows a grease retainer somewhat 'pl yed to keep the diaphra in p per co-acting similar to that of Figures 1 and 2, but with the relationship with the shaft 4| at all times. The

spring-retaining washer omitted. washer 28, inaddition to forming a surface Figure 6 illustrates a further modification of against which blows can be directed in inserting the form shown in Figure 5. the seal in position, also operates to hold the Figure '7 shows still another modification. sp ing 40 in desired relationship with e p t to 50 Figure 8 shows an important embodiment of the diaphragm and the shaft which it surrounds. the invention wherein contact with the housing A feature of this invention resides in extending is part metal and part composition. or elongating a portion 42 of the diaphragm over Figure 9 illustrates an embodiment of the inand around the edge of the seal and vulcanizing vention wherein the seal as a whole is fitted into this portion 42 onto the outer face of the rim of 5 2 the cup-shaped'element whereby an additional sealing means is provided and one which is much more satisfactory than the usual metal-tometal contact which heretofore has been considered the only feasible means of making a seal.

Experience has proven that metal-to-metal contact such as this will frequently leak, these leaks being due to various causes, particularly ecoentricities or out-of-roundness in either the housing or the shell or perhaps to tool marks, scratches and the like in either or 'both of the elements. That portion of the diaphragm 42 which is molded or vulcanized onto the outer face of the shell 20 will thereupon fit against the inner face of the housing for which the retainer is intended, forming a more cushion-like and compressive action which, while securely maintaining the grease retainer in desired position, will also function as an improved sealing means.

In Figure 2, the diaphragm 32 isvulcanized to a. shell 33 which has an offset portion 34 into which a washer 35 is seated and held in position by a spinning down of the edge 34 as shown. In this case, the diaphragm is also brought around the outer face of the shell 33 forming a better, sealing relationship between the metal of the shell and the metal of the housing while at the same time a small portion of the shell is allowed to contact the housing.

In Figure 3, another type is shown wherein the diaphragm 36 is molded to a cup-shaped shell 31 which is offset at 38, thereby providing a surface half of metal and half of plastic composition as shown at 39 whereby a combined sealing contact will'be effected, A spring-retaining washer 43 is used with this type of shell.

In Figure 4, the shell 44 is made all in one piece having tongues 45 bent inwardly to retain the spring 46 in position on the diaphragm 41, the diaphragm being molded to the shell as before and with one portion 48 extending around the outer edge thereof to provide an additional seal- I ing surface with the surrounding housing.

A simplified type is illustrated in Figure 5 wherein an L-shaped shell 49 isprovided with no outer washer, the diaphragm 50 being simply molded thereto as shown, and with the garter spring 5| applied to the diaphragm over the slight hump in the forward edge thereof, which in most cases will effectively retain the spring in position. In this type, the outer layer 52 of plastic has no fabric associated therewith, the fabric being stopped at a point 53 as shown.

In Figure 6, the structure is almost exactly similar to that shown in Figure 5 except that the fabric 54 of theniiaphragm 55 extends completely thereover and around the outer edge of the shell 56, it being understood that the fabric is molded with and forms an integral part of the plastic composition of the diaphragm which usually is synthetic rubber but may be some other material.

In all of these structures, it will be noted that allowance is made for suiilcient flexibility of the diaphragm in that the metal shell is apertured sufficiently over and above the diameter of the shaft to which it is to be applied so as to allow for a considerable flexing action of the associated diaphragm, thereby automatically compensating for eccentricities or irregularities in the movement of the shafts.

In Figure '7 is shown a structure somewhat similar to that of Figures 5 and 6 except that the' shell 51 has an outer down-turned lip 58 which, however, does not extend down to the spring 59 but which does afford a stronger edge and also a surface against which pressure or blows may be directed in or installing the seal. The diaphragm 50 extends out over the outer face of the shell as shown, and it will be noted in all these structures that openings are made in the shells into and through which the plastic material of the diaphragm is extruded during the process of molding and vulcanizing.

In Figure 8, an embodiment of the invention somewhat similar to the structures shown in Figures 3 and 4 is illustrated wherein there is both a metal and compositioncontact with the inner face of a surrounding housing (not shown). It will be noted that the diaphragm 98 is molded into a cup-shaped shell 99 L-shaped in crosssection with a portion of the diaphragm adapted to sealingly contact a shaft I00. The diaphragm, however, does not extend completely over the outer surface of the shall 99, there being a further L-shaped shell IOI fitted over this portion of the inner shell, the shell I0l being also L-shaped in cross-section and preferably of slightly heavier metalthan the material of the shell 99 andalso somewhat thicker than the diaphragm element 98. This is particularly advantageous whenthe device is fitted into a housing as the metal of the shell I! is compressed in position in the housing, the same being always made slightly oversize so far as the internal diameter of the housing is concerned, and the external diameter of the outer sealing portion of the diaphragm 98 is also made slightly larger than the internal diameter of the corresponding housing only not to so great 'an extent as the thickness of the metal IOI.

Therefore, on application, the metal portion is compressed and as often times occurs in these installations, the surrounding housing may be somewhat out of round or have score marks or the like therein, in which event the metal-tometal contact will permit leakage. The fact that the resilient material of the composition diaphragm 98 is also slightly compressed on application and which, furthermore, acts as a cork does when being positioned in a bottle, will eliminate and completely seal against any possible leaks which might occur between the adjacent metal portions.

In Figure 9, the sealing element is adapted to rotate with the shaft I02 and consists of a metal shell I03 having a diaphragm I04 molded thereon, the same being then press-fitted onto a shaft' with .the outer periphery of the diaphragm adapted to sealingly contact the inner surface of a surrounding housing I05. Spring fingers I00 are made integral with the cup-shaped metal element I03 so that the outer periphery of the diaphragm I04 is always pushed outwardly and into proper sealing relationship with the interior face of the housing I05.

A still further type is illustrated in Figure 10 wherein the shell 68 is somewhat V-shaped in cross-section as shown, one leg of the V having the plastic portion 59 of the diaphragm vulcanized thereto and the other leg being bent inwardly and through the diaphragm, both legs being bent outwardly at their edges, one to provide a protective edge 10 for the adjacent portion of the diaphragm 69 and also to provide a partial metal-to-metal contact with the housing. The other leg is bent downwardly as shown at 1| to maintain the spring in desired position.

A somewhat similar device is illustrated in Figure 11 wherein the V-shaped cup [2 is provided, a portion thereof being flared outwardly at I3 to provide a better metal-to-metal contact while another portion has the packing element 14 vulcanized thereto.

A U-shaped shell 18 is shown in Figure 12,

having a considerably greater surface for vulcanization of the diaphragm 19 thereto which extends around the outer edge as shown, and this shell has an inner flange 88 which is parallel to the shaft and which retains its associated part of the diaphragm at a spaced distance from the shaft.

A further type is shown in Figure 13 wherein an L-shaped shell 8| has the diaphragm 82 vulcanized thereto, and the shell is reinforced by an inner cup-shaped element 83 also of metal which further acts to retain the garter spring in position on the diaphragm. This diaphragm has an offset portion 85 whereby a combination oil and dust seal structure is produced, the outer and smaller contacting surface providing a dust seal while the wider contacting surface seals against oil or grease.

A structure somewhat similar to that shown in Figure 12 is illustrated in Figure 14, the main difference being that the outer edge of the U- shaped shell 86 is flared outwardly to protect the corresponding portion of the diaphragm 81 and also to provide somewhat of a metal-to-metal contact with the housing. A space 88 is provided between the end of the molded diaphragm and the flared edge of the shell 86 so as to allow for distortion or bodily shifting of the material of the diaphragm or packing.

A very similar structure is illustrated in Figure 15, the shell 89 being cut away so as to allow more flexibility of the shaft-contacting portion of the diaphragm.

In Figure 16, a supporting shell 90 is provided having the diaphragm 9| vulcanized thereto and an inner shell 92 which is of thinner metal is press-fitted into the shell 99, the inner shell being somewhat S-shaped in cross-section so as to provide both a pushing surface for installation purposes and a retainer for the spring.

In Figure 17, the shell 93 has a diaphragm 94 vulcanized thereto as in Figure 16 and an inner shell 95 of a spring material is fitted into the original shell or cup 93, the inner shell having a plurality of spring fingers 96 which contact the adjacent lip or shaft-contacting portion of the diaphragm thereto forcing the same against the shaft at all times. A hump 91 is molded into this outer lip of the diaphragm against which the spring fingers 96 may act, and this hump also prevents accidental or unauthorized withdrawal of the inner shell and resilient element 95.

In Figure 19, an embodiment of the invention somewhat similar to the structures shown in Figures 3 and 4 is illustrated wherein there is both a metal and composition contact with the inner face of a surrounding housing (not shown). It will be noted that the diaphragm 98 is molded into a cup-shaped shell 99 L-shaped in crosssection with a portion of the diaphragm adapted to sealingly contact a shaft I88. The diaphragm, however, does not extend completely over the outer surface of the shell 99, there being a further L-shaped. shell Hll fitted over this portion of the inner shell, the shell l0l being also L-shaped in cross-section and preferably of slightly heavier metal than the material of the shell 99 and also somewhat thicker than the diaphragm element 98. This is particularly advantageous when the device is fitted into a housing as the metal of the shell IN is compressed in position in the housing,

the same being always made slightly oversize so far as the internal diameter of the housing is concerned, and the external diameter of the outer sealing portion of the diaphragm 98 is also made slightly larger than the internal diameter of the corresponding housing only not to so great an extent as the thickness of the metal IDI.

Therefore, on application, the metal portion is compressed and as oftentimes occurs in these installations, the surrounding housing may be somewhat out of round or have score marks or the like therein, in which event the metal-tometal contact will permit leakage. The fact that the resilient material of the composition diaphragm 98 is also slightly compressed on application and which, furthermore, acts as a cork does when being positioned in a bottle, will eliminate and completely seal against any possible leaks which might occur between the adjacent metal portions.

' In Figure 9, the sealing element is adapted to rotate with the shaft I02 and consists of a metal shell I93 having a diaphragm I94 molded thereon, the same being then press-fitted onto a shaft with the outer periphery of the diaphragm adapted to sealingly contact the inner surface of a surrounding housing l95. Spring fingers I06 are made integral with the cup-shaped metal element I03 so that the outer periphery of the diaphragm I04 is always pushed outwardly and into proper sealing relationship with the interior face of the housing I95.

In all these structures, the material of the diaphragm, being vulcanized to the metal shell, cannot possibly turn with regard thereto, and inasmuch as the metal shell is quite firmly held in position in either the surrounding housing or on the rotating shaft, no undesirable movement of the diaphragm or other sealing structure can possibly take place. The combination, in one structure, of both an inner and outer seal, which may be an integral structure, is believed to be novel, and the invention enables the use of a minimum number of parts, which is, of course, important in commercial construction. Furthermore, the corklike sealing structure of the rubber or other composition on the outer face of the metal shell either by itself or when associated with an adliacent metal sealing structure produces an absolutely leak-tight structure which is efllcient under all conditions of use including variations in temperature, pressure and also the innumerable varieties of lubricating oils and compounds employed.

The molding of the diaphragm to a. metal shell, which, for the most part, is spaced away a considerable distance from the associated shaft or other element, provides for a greater flexibility of the sealing diaphragm structure, thereby allowing, in a much greater measure, for the possible eccentricities or wobblings of the shaft or similar structure. A greatly increased wiping surface is also rendered possible by the exercise of this invention.

It will be evident that herein is provided an oil seal which combines all the advantages of a steel housing or supporting shell with a flexible diaphragm and which, furthermore, includes an additional sealing structure around the outer face of the metal shell or cup which will positively insure against any leakage between the shell and the surrounding housing even though there may be some slight discrepancies in sizes. Such a structure, particularly those wherein the outer sealing point is integral with the diaphragm, provides a much more positive and satisfactory sealing action, and, furthermore, produces a simple more easily manufactured oil seal and one which, on account of its moldedstructure, can be made very attractive so far as the trade is concerned.

Various plasticsor sealing elements may be used either in conjunction with the diaphragm or separate therefrom, the main object being a compressible sealing composition .either wholly or partially covering the entire contacting face of the sustaining shell whereby a better and more positive and strictly oil-tight seal with a surrounding housing is effectively produced.

I am aware that many changes may be made and numerous details of construction varied throughout a wide range without departing from the principles of this invention, and I, therefore, do not purpose limiting the patent granted hereon otherwise than as necessitated by the prior art.

I claim as my invention:

1. A fluid seal, comprising a cup-shaped shell, a flexible sealing element mounted on the shell and adhesively applied to at least two faces thereof, one face comprising the outer rim of the shell, a portion of the outer face of the shell being bare and adapted to aflord a metal-tometal contact with a surrounding housing.

2. A fluid seal, comprising a-cup-shaped shell, 9. flexible sealing element mounted on the shell and adhesively applied to at least two faces thereof, one face comprising the outer rim of the shell, a portion of the outer face of the shell being bare and adapted to afford a metalto-metal contact with a surrounding housing, and a reinforcing washer positioned in the shell adjacent such metal-to-metal contact.

3. A fluid seal, comprising a cup-shaped annular shell, a flexible sealing element mounted on the shell and adhesively applied to at least two faces thereof, one face comprising the outer rim of the shell for sealing contact with a surrounding housing, the flexible sealing element comprising a plastic and a fabric in vulcanized molded relationship, the fabric extending over the shaft sealing portion of the flexible element, and the plastic alone extending over the housing sealing portion of the element.

4. A fluid seal for rotatable shafts, comprising an open cup-shaped shell, a flexible sealing element mounted on the shell and adhesively applied to at least two faces thereof adapted to-contact both the shaft and the housing, in

which the seal is positioned, the flexible sealing element comprising a plastic and a fabric in vulcanized molded relationship, the fabric extending over both the shaft sealing and the housing sealing portion of the flexible element.

5. A fluid seal, comprising a cup-shaped shell, a flexible sealing element mounted on the shell and adhesively applied to at least two faces thereof, one face comprising the outer rim of the shell, one edge of the cup-shaped shell being inturned to provide a pushing surface.

6. A fluid seal for shafts and housings, comprising a cup-like shell Lshaped in cross-section, a flexible packing element vulcanized to both outer faces of the shell, the packing element having an inwardly projecting cylindrical portion adapted to sealingly contact the shaft, and the outer portion of the packing element adapted to sealingly contact the inner face of the surrounding housing, and an integral outwardly turned flange on the shell also adapted to contact the housing.

7-. A fluid seal, comprising a cup-shaped shell, a flexible sealing element mounted on the shell and adhesively applied to at least two faces thereof, one face comprising the outer rim of the shell, a portion of the outer face of the shell being bare and adapted to afford a metalto-metal contact with a surrounding housing, the bare outer face of the shell being of a slightly greater diameter than the corresponding adjacent outer face of the flexible sealing element.

JOSEPH B. VICTOR.